Relevance. A rare, predominantly congenital pathology Fusion of the tympanic part of the temporal bone with the medial surface of the angle of the mandible leads to irreversible pathological processes in the maxillofacial region, which significantly reduces the quality of life of the animal. The article discusses surgical correction options that can improve the dog’s quality of life. A timely procedure increased the comfort of existence and improved the general health of the animal, eliminating discomfort, otitis media and pain.Methods. The method of choice was technically complex bilateral subtotal mandibulectomy. To perform the procedure, the following were used: surgical dental instruments; dental unit with high-speed and low-speed handpieces; various types of bur. For extra- and intraoral radiography, the following were used: CR7Vet X-ray digitizer with luminoform plates (0, 1, 2, 3, 4, 5); combined general anesthesia with the use of narcotic and potent drugs.Results. The solution of this problem is possible only operationally, therefore, the method of choice was bilateral subtotal mandibulectomy, the evaluation of which served as the purpose of the study. As a result of the procedure, already on the 14th day, the dog had activity, satisfactory well-being, and no problems with taking food and water. The study of the results of the study showed that the pathology requires immediate intervention, since the outcome of the fusion of the tympanic part of the temporal bone with the medial surface of the angle of the lower jaw in a few weeks can lead to inoperable.